Dermatology Flashcards
Primary skin lesion
Has not been altered by outside manipulation, treatment, natural course of disease. Ex- vesicles
Secondary skin lesion
Lesions altered by outside manipulation, treatment, natural course of disease.
Ex- crust from ruptured vesicles, excoriation, lichenification, scales, erosion, ulcer, fissure
Macule
Flat, non-palpable.
Papule
Solid elevation,
Pustule
Vesicle-like lesion with purulent content,
Umbilicated
Papule with indented center
Patch
Flat, non-palpable area of skin discoloration larger than a Macule. >1cm
Ex- vitiligo
Plaque
Raised lesion, same or different color from surrounding skin, can result from a coalescence of papules >1cm
Ex- psoriasis vulgaris
Bulla
Fluid-filled >1cm
Ex- 2nd degree burn (blister)
Cyst
Raised, encapsulated, fluid filled lesion
Ex- intradermal cyst
Wheal
Circumscribed area of skin edema
Ex- hives, ppd
Purpura, petechiae
Flat red-purple discoloration that does not blanch with pressure.
>1cm= purpura
Lichenification
Skin thickening usually found over pruritic or friction areas
Confluent lesions
Multiple lesions blending together
Ex- psoriasis, tinea
Annular lesions
In a ring, often seen in the characteristic “Bulls eye” lesion seen in Lyme disease
Actinic keratoses
Brown, occasionally skin colored, scaly. Can be felt by running finger over area. Feels rough like Sand paper.
Most common precancerous skin lesion, can remain unchanged, spontaneously resolve, or progress to invasive squamous cell carcinoma.
Basal cell
Most common, sun-exposed areas, arise on their own (de novo), pearly, waxy appearance, with relatively distinct borders.
Papule, nodule with or without central erosion
Mets risk low, significant tissue destruction risk without treatment.
Squamous cell
Less common, can arise from nothing, KERATINIZING CELLS or AK’s.
Red, conical hard lesions with or without ulceration, less distinct borders.
Mets risk greater than BCC, (3-7%), significant tissue destruction without treatment. Greatest risk on lip, oral cavity, genitalia